let me start from behind:
Application Profiler is yet not capable of detecting thread preemtion,
so what you will get when profiling a multi threaded app is always REALTIME not CPUTIME.

With function instrumentation you're able to measure every function that is compiled with this option.
As pthread_*() is all part of libc.so you can't get numbers for this functions unless you use an instrumented version of
 libc, which you will have to build on your own.

if you're planning to do benchmarks on some OS objects, this is probably not the right approach - you should use 
different time functions for this.

HTH
/hp


-----Ursprüngliche Nachricht-----
Von:	Andreas Polychronopoulos [mailto:community-noreply@qnx.com]
Gesendet:	Sa 28.02.2009 14:30
An:	ostech-core_os
Cc:	
Betreff:	Application Profiler 

Hi everybody,

I am trying to measure the time a mutex take to lock and unlock , here is my code

*****************************************************
void *functionA();

int main(int argc, char *argv[]) {
	
	/* initialize mutex1 */
	pthread_mutex_init(&mutex1, NULL);
	
	/* create threads */
	pthread_create(&tid_A, NULL, &functionA ,NULL);
	
	/* 2 secs sleep */
	sleep(2);
}

void *functionA(){
	pthread_mutex_lock(&mutex1);
	pthread_mutex_unlock(&mutex1);
}
*******************************************************

I build the application with the IDE and at Build Options i choosed , build for profiling (Function Instrumentation)

Then i create a new run configuration for the _g binary adding the appropriate Application Profiler tool on Tools bar of
 the Open Run dialog.

I can get results for the function main and functionA but not for pthread_mutex_lock,pthread_mutex_unlock. Is it 
possible to get the time for each line of code ?
The Functon Instrumentation mode is good for single thread application what about add more threads on the above code ? 
Will i get correct results or should i do a different profile ?

thanks


_______________________________________________
OSTech
http://community.qnx.com/sf/go/post23159 
 
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If you want to use application profiler for system functions, you can 
wrap them with your own functions, in this case it measure their time + 
overhead of calling a function.

Andreas Polychronopoulos wrote:
> Hi everybody,
>
> I am trying to measure the time a mutex take to lock and unlock , here is my code
>
> *****************************************************
> void *functionA();
>
> int main(int argc, char *argv[]) {
> 	
> 	/* initialize mutex1 */
> 	pthread_mutex_init(&mutex1, NULL);
> 	
> 	/* create threads */
> 	pthread_create(&tid_A, NULL, &functionA ,NULL);
> 	
> 	/* 2 secs sleep */
> 	sleep(2);
> }
>
> void *functionA(){
> 	pthread_mutex_lock(&mutex1);
> 	pthread_mutex_unlock(&mutex1);
> }
> *******************************************************
>
> I build the application with the IDE and at Build Options i choosed , build for profiling (Function Instrumentation)
>
> Then i create a new run configuration for the _g binary adding the appropriate Application Profiler tool on Tools bar 
of the Open Run dialog.
>
> I can get results for the function main and functionA but not for pthread_mutex_lock,pthread_mutex_unlock. Is it 
possible to get the time for each line of code ?
> The Functon Instrumentation mode is good for single thread application what about add more threads on the above code ?
 Will i get correct results or should i do a different profile ?
>
> thanks
>
>
> _______________________________________________
> OSTech
> http://community.qnx.com/sf/go/post23159
>
>